I disagree with this. Me and my friends regularly use Tabletop Simulator for playing together remotely, and I use it far more often than any of the game apps I own. With thousands of games freely available through the Steam Workshop, many of which are very well implemented, we find it an excellent platform for playing almost anything.

CD Keys is not an official reseller. They are mainly bundle keys which are not allowed to be resold. And one occasion you can receive keys which are either used already, stolen, or revoked later because they were bought with a stolen card.
Which is why CD Key deals are not allowed to be posted as deals on Reddit for example.

I am happy it worked out for you. I know plenty of people where it has not so I am very careful and suspicious and also am careful posting deals here (you might have noticed there is not an abundance for these sites posted here as well (and of course on Reddit and other like forums it is prohibited).

Not that I am saying you did but I am always amazed how some people on Ozbargain think it is cool and necessary to neg a statement of fact as what I said was not even an opinion but facts that can be verified by articles about the matter.